Lisle Oil Pan Plug Rethread Kit 58850 — 3-Size Magnetic Plugs with Piloted Drill & Spring-Loaded Tap Guide

Lisle 58850 is a complete rethread kit that repairs stripped oil pan drain threads using a piloted drill, a spring-loaded tap guide, and magnetic replacement plugs so you can restore a leak-free drain quickly.

If an oil pan drain hole has been damaged or the threads are worn, replacing the entire oil pan can be costly and time-consuming. The Lisle 58850 kit gives technicians and DIYers a compact, vehicle-friendly way to re-establish proper threads and install a secure magnetic drain plug without removing the pan in many cases. It’s designed specifically for softer metals commonly used for oil pans and aims to keep the new thread aligned to the gasket surface so leaks are less likely.

How does the Lisle 58850 rethread kit restore damaged drain threads?

The kit uses a piloted drill to clear the damaged thread area, then a spring-loaded tapping tool that self-centers and keeps the new thread perpendicular to the sealing surface. This guided tapping reduces the chance of angled threads that can cause oil seepage. Once the hole is rethreaded, one of the included magnetic drain plugs threads in to provide a reliable seal.

• Piloted drill removes damaged material while staying centered
• Spring-loaded tapping tool ensures square, aligned threads
• Magnetic plugs resist loosening and attract metal debris
• Kit restores thread sizes for common drain plugs

Which pan materials and thread sizes are compatible with this kit?

The Lisle 58850 is intended for oil pans made of soft steel and aluminum, not hardened or cast iron pans. It includes tooling matched to the three most common drain plug sizes so it covers many passenger vehicles and light trucks. If your pan uses hardened steel drain fittings, the kit may not cut properly.

• Designed for soft-steel and aluminum oil pans
• Supports 1/2 inch, 12 mm, and 14 mm thread sizes
• Not recommended for hardened steel or cast-iron pans
• Works in-situ when there is enough working clearance

Can I use this kit without removing the oil pan from the vehicle?

Yes — the kit is built so rethreading can be performed with the pan installed if there is sufficient access to the drain area. The piloted drill and spring-loaded tap help maintain alignment in tight spaces. However, if access is severely restricted, removing the pan may still be necessary to get a clean, straight thread.

• Tooling supports in-place repairs when space permits
• Short, guided drill and tap reduce wobble in confined areas
• Removing the pan can improve access and visibility if needed
• Follow vehicle service manual for safe jacking and support

What comes in the kit and how does each part help the repair?

The set contains a piloted drill that centers the cut, a spring-loaded tapping tool that holds the tap perpendicular to the gasket surface, and five magnetic drain plugs for replacement. The pilot keeps the drill aligned, the tap guide prevents angled threads, and the magnetic plugs provide a simple, forgiving sealing solution that attracts small metal particles.

• Piloted drill: centers and clears damaged threads
• Spring-loaded tapping tool: ensures square thread formation
• Five magnetic drain plugs: replacement plugs in common sizes
• Compact kit: suited for garage or mobile use

Who is this for: The Lisle 58850 Rethread Kit is ideal for mobile mechanics, home DIY repairers, and professional shops that service passenger cars and light trucks with aluminum or soft-steel oil pans. Use it when drain threads are stripped or leaking and you want a cost-effective repair without replacing the entire pan — provided you have adequate access to the drain area and are working on compatible pan materials.